import json
import urllib.request

# 从URL获取JSON数据并解码
url = "https://example.com/api/data.json"
response = urllib.request.urlopen(url)
data = json.loads(response.read().decode('utf-8'))

# 使用解码后的数据
print(data["key"])

// 使用fetch API
fetch('https://example.com/api/data.json')
  .then(response => response.json())
  .then(data => {
    console.log(data.key);
  })
  .catch(error => console.error('Error:', error));

// 或使用XMLHttpRequest
const xhr = new XMLHttpRequest();
xhr.open('GET', 'https://example.com/api/data.json', true);
xhr.onload = function() {
  if (xhr.status === 200) {
    const data = JSON.parse(xhr.responseText);
    console.log(data.key);
  }
};
xhr.send();

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import org.json.JSONObject;

public class JsonFromUrl {
    public static void main(String[] args) throws Exception {
        URL url = new URL("https://example.com/api/data.json");
        BufferedReader reader = new BufferedReader(new InputStreamReader(url.openStream()));
        StringBuilder json = new StringBuilder();
        String line;
        
        while ((line = reader.readLine()) != null) {
            json.append(line);
        }
        reader.close();
        
        JSONObject data = new JSONObject(json.toString());
        System.out.println(data.get("key"));
    }
}